/*
 * Copyright (c) 2010, okazoh_tk. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  - Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "alkes/tree/Container.h"

namespace alkes {

Container::Container()
{
}

Container::~Container()
{
}

ElementContainer& Container::getChildren()
{
    return children_;
}

bool Container::hasVisibleChild() const
{
    bool ret = false;

    ElementContainer::Iterator iter = children_.getFirst();

    while (iter && !ret)
        ret = iter_cast<const Element*>(iter)->isVisible();

    return ret;
}

bool Container::addChild(Element* child)
{
    if (!child)
        return false;

    bool ret = children_.push(child);
    if (ret)
        setDirty(true);

    return ret;
}

void Container::removeChild(Element* child)
{
    if (!child)
        return ;

    children_.remove(child);
}

bool Container::onPreRender(GraphicsContext& /*gc*/, Iterator& reverse_iter)
{
    reverse_iter = getChildren().getLast();
    return true;
}

void Container::onPostRender(GraphicsContext& /*gc*/, bool /*rendered_child*/)
{
}

bool Container::onPreUpdate(UpdateContext& /*uc*/, Iterator& reverse_iter)
{
    reverse_iter = getChildren().getLast();
    return true;
}

bool Container::onPostUpdate(UpdateContext& uc, bool updated_child)
{
    // relay child flag to parent, because update dirty region of ancestor.
    return isDirty() || uc.relayDirtyFlag(updated_child);
}

}
